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Thumb1 register to register MOV instruction is predicable.

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Fix a FIXME and allow predication (in Thumb2) for the T1 register to
register MOV instructions. This allows some better codegen with
if-conversion (as seen in the test updates), plus it lays the groundwork
for pseudo-izing the tMOVCC instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134197 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2011-06-30 22:10:46 +00:00
parent 2541c41f3e
commit 63b46faeb8
10 changed files with 67 additions and 59 deletions
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4
lib/Target/ARM/Thumb1InstrInfo.cpp
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@@ -46,8 +46,8 @@ void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
else if (tDest)
Opc = ARM::tMOVgpr2tgpr;
BuildMI(MBB, I, DL, get(Opc), DestReg)
.addReg(SrcReg, getKillRegState(KillSrc));
AddDefaultPred(BuildMI(MBB, I, DL, get(Opc), DestReg)
.addReg(SrcReg, getKillRegState(KillSrc)));
assert(ARM::GPRRegClass.contains(DestReg, SrcReg) &&
"Thumb1 can only copy GPR registers");
}